If you know someone is out on the Trail send 'em 20 bucks and tell them to take a friend out for a pizza and a couple of beers. They'll remember this long after the jerky, cookies, Rice Krispie treats etc. are long forgotten. There is nothing remotely improper or vulgar about sending someone a few dollars as a surprise or gift. One size fits all and no one's ever felt the need to return or exchange it.